Passed OCPJP

Passed OCPJP 6 yesterday, got 85%! Huge thanks to Kathy and Bert for their fatnastic study guide and great practice exam books. I have used both and I can say that this is really all that anybody needs to pass the exam. I am very excited about getting my cert and can't wait to start working on my programming portfolio. I have already wrote TicTakToe game today and would really apreciate if anybody can advise what kind of progs that I could put on my portfolio? I am little bit stuck for ideas